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[deliverable/linux.git] / drivers / infiniband / hw / mthca / mthca_main.c
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id: mthca_main.c 1396 2004-12-28 04:10:27Z roland $
35 */
36
37 #include <linux/config.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/errno.h>
41 #include <linux/pci.h>
42 #include <linux/interrupt.h>
43
44 #include "mthca_dev.h"
45 #include "mthca_config_reg.h"
46 #include "mthca_cmd.h"
47 #include "mthca_profile.h"
48 #include "mthca_memfree.h"
49
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("Mellanox InfiniBand HCA low-level driver");
52 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_VERSION(DRV_VERSION);
54
55 #ifdef CONFIG_INFINIBAND_MTHCA_DEBUG
56
57 int mthca_debug_level = 0;
58 module_param_named(debug_level, mthca_debug_level, int, 0644);
59 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
60
61 #endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */
62
63 #ifdef CONFIG_PCI_MSI
64
65 static int msi_x = 0;
66 module_param(msi_x, int, 0444);
67 MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
68
69 static int msi = 0;
70 module_param(msi, int, 0444);
71 MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");
72
73 #else /* CONFIG_PCI_MSI */
74
75 #define msi_x (0)
76 #define msi (0)
77
78 #endif /* CONFIG_PCI_MSI */
79
80 static int tune_pci = 0;
81 module_param(tune_pci, int, 0444);
82 MODULE_PARM_DESC(tune_pci, "increase PCI burst from the default set by BIOS if nonzero");
83
84 static const char mthca_version[] __devinitdata =
85 DRV_NAME ": Mellanox InfiniBand HCA driver v"
86 DRV_VERSION " (" DRV_RELDATE ")\n";
87
88 static struct mthca_profile default_profile = {
89 .num_qp = 1 << 16,
90 .rdb_per_qp = 4,
91 .num_cq = 1 << 16,
92 .num_mcg = 1 << 13,
93 .num_mpt = 1 << 17,
94 .num_mtt = 1 << 20,
95 .num_udav = 1 << 15, /* Tavor only */
96 .fmr_reserved_mtts = 1 << 18, /* Tavor only */
97 .uarc_size = 1 << 18, /* Arbel only */
98 };
99
100 static int __devinit mthca_tune_pci(struct mthca_dev *mdev)
101 {
102 int cap;
103 u16 val;
104
105 if (!tune_pci)
106 return 0;
107
108 /* First try to max out Read Byte Count */
109 cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
110 if (cap) {
111 if (pci_read_config_word(mdev->pdev, cap + PCI_X_CMD, &val)) {
112 mthca_err(mdev, "Couldn't read PCI-X command register, "
113 "aborting.\n");
114 return -ENODEV;
115 }
116 val = (val & ~PCI_X_CMD_MAX_READ) | (3 << 2);
117 if (pci_write_config_word(mdev->pdev, cap + PCI_X_CMD, val)) {
118 mthca_err(mdev, "Couldn't write PCI-X command register, "
119 "aborting.\n");
120 return -ENODEV;
121 }
122 } else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE))
123 mthca_info(mdev, "No PCI-X capability, not setting RBC.\n");
124
125 cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);
126 if (cap) {
127 if (pci_read_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, &val)) {
128 mthca_err(mdev, "Couldn't read PCI Express device control "
129 "register, aborting.\n");
130 return -ENODEV;
131 }
132 val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
133 if (pci_write_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, val)) {
134 mthca_err(mdev, "Couldn't write PCI Express device control "
135 "register, aborting.\n");
136 return -ENODEV;
137 }
138 } else if (mdev->mthca_flags & MTHCA_FLAG_PCIE)
139 mthca_info(mdev, "No PCI Express capability, "
140 "not setting Max Read Request Size.\n");
141
142 return 0;
143 }
144
145 static int __devinit mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim)
146 {
147 int err;
148 u8 status;
149
150 err = mthca_QUERY_DEV_LIM(mdev, dev_lim, &status);
151 if (err) {
152 mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
153 return err;
154 }
155 if (status) {
156 mthca_err(mdev, "QUERY_DEV_LIM returned status 0x%02x, "
157 "aborting.\n", status);
158 return -EINVAL;
159 }
160 if (dev_lim->min_page_sz > PAGE_SIZE) {
161 mthca_err(mdev, "HCA minimum page size of %d bigger than "
162 "kernel PAGE_SIZE of %ld, aborting.\n",
163 dev_lim->min_page_sz, PAGE_SIZE);
164 return -ENODEV;
165 }
166 if (dev_lim->num_ports > MTHCA_MAX_PORTS) {
167 mthca_err(mdev, "HCA has %d ports, but we only support %d, "
168 "aborting.\n",
169 dev_lim->num_ports, MTHCA_MAX_PORTS);
170 return -ENODEV;
171 }
172
173 if (dev_lim->uar_size > pci_resource_len(mdev->pdev, 2)) {
174 mthca_err(mdev, "HCA reported UAR size of 0x%x bigger than "
175 "PCI resource 2 size of 0x%lx, aborting.\n",
176 dev_lim->uar_size, pci_resource_len(mdev->pdev, 2));
177 return -ENODEV;
178 }
179
180 mdev->limits.num_ports = dev_lim->num_ports;
181 mdev->limits.vl_cap = dev_lim->max_vl;
182 mdev->limits.mtu_cap = dev_lim->max_mtu;
183 mdev->limits.gid_table_len = dev_lim->max_gids;
184 mdev->limits.pkey_table_len = dev_lim->max_pkeys;
185 mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay;
186 mdev->limits.max_sg = dev_lim->max_sg;
187 mdev->limits.max_wqes = dev_lim->max_qp_sz;
188 mdev->limits.max_qp_init_rdma = dev_lim->max_requester_per_qp;
189 mdev->limits.reserved_qps = dev_lim->reserved_qps;
190 mdev->limits.max_srq_wqes = dev_lim->max_srq_sz;
191 mdev->limits.reserved_srqs = dev_lim->reserved_srqs;
192 mdev->limits.reserved_eecs = dev_lim->reserved_eecs;
193 mdev->limits.max_desc_sz = dev_lim->max_desc_sz;
194 /*
195 * Subtract 1 from the limit because we need to allocate a
196 * spare CQE so the HCA HW can tell the difference between an
197 * empty CQ and a full CQ.
198 */
199 mdev->limits.max_cqes = dev_lim->max_cq_sz - 1;
200 mdev->limits.reserved_cqs = dev_lim->reserved_cqs;
201 mdev->limits.reserved_eqs = dev_lim->reserved_eqs;
202 mdev->limits.reserved_mtts = dev_lim->reserved_mtts;
203 mdev->limits.reserved_mrws = dev_lim->reserved_mrws;
204 mdev->limits.reserved_uars = dev_lim->reserved_uars;
205 mdev->limits.reserved_pds = dev_lim->reserved_pds;
206 mdev->limits.port_width_cap = dev_lim->max_port_width;
207 mdev->limits.page_size_cap = ~(u32) (dev_lim->min_page_sz - 1);
208 mdev->limits.flags = dev_lim->flags;
209 /*
210 * For old FW that doesn't return static rate support, use a
211 * value of 0x3 (only static rate values of 0 or 1 are handled),
212 * except on Sinai, where even old FW can handle static rate
213 * values of 2 and 3.
214 */
215 if (dev_lim->stat_rate_support)
216 mdev->limits.stat_rate_support = dev_lim->stat_rate_support;
217 else if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
218 mdev->limits.stat_rate_support = 0xf;
219 else
220 mdev->limits.stat_rate_support = 0x3;
221
222 /* IB_DEVICE_RESIZE_MAX_WR not supported by driver.
223 May be doable since hardware supports it for SRQ.
224
225 IB_DEVICE_N_NOTIFY_CQ is supported by hardware but not by driver.
226
227 IB_DEVICE_SRQ_RESIZE is supported by hardware but SRQ is not
228 supported by driver. */
229 mdev->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT |
230 IB_DEVICE_PORT_ACTIVE_EVENT |
231 IB_DEVICE_SYS_IMAGE_GUID |
232 IB_DEVICE_RC_RNR_NAK_GEN;
233
234 if (dev_lim->flags & DEV_LIM_FLAG_BAD_PKEY_CNTR)
235 mdev->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
236
237 if (dev_lim->flags & DEV_LIM_FLAG_BAD_QKEY_CNTR)
238 mdev->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
239
240 if (dev_lim->flags & DEV_LIM_FLAG_RAW_MULTI)
241 mdev->device_cap_flags |= IB_DEVICE_RAW_MULTI;
242
243 if (dev_lim->flags & DEV_LIM_FLAG_AUTO_PATH_MIG)
244 mdev->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
245
246 if (dev_lim->flags & DEV_LIM_FLAG_UD_AV_PORT_ENFORCE)
247 mdev->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
248
249 if (dev_lim->flags & DEV_LIM_FLAG_SRQ)
250 mdev->mthca_flags |= MTHCA_FLAG_SRQ;
251
252 return 0;
253 }
254
255 static int __devinit mthca_init_tavor(struct mthca_dev *mdev)
256 {
257 u8 status;
258 int err;
259 struct mthca_dev_lim dev_lim;
260 struct mthca_profile profile;
261 struct mthca_init_hca_param init_hca;
262
263 err = mthca_SYS_EN(mdev, &status);
264 if (err) {
265 mthca_err(mdev, "SYS_EN command failed, aborting.\n");
266 return err;
267 }
268 if (status) {
269 mthca_err(mdev, "SYS_EN returned status 0x%02x, "
270 "aborting.\n", status);
271 return -EINVAL;
272 }
273
274 err = mthca_QUERY_FW(mdev, &status);
275 if (err) {
276 mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
277 goto err_disable;
278 }
279 if (status) {
280 mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
281 "aborting.\n", status);
282 err = -EINVAL;
283 goto err_disable;
284 }
285 err = mthca_QUERY_DDR(mdev, &status);
286 if (err) {
287 mthca_err(mdev, "QUERY_DDR command failed, aborting.\n");
288 goto err_disable;
289 }
290 if (status) {
291 mthca_err(mdev, "QUERY_DDR returned status 0x%02x, "
292 "aborting.\n", status);
293 err = -EINVAL;
294 goto err_disable;
295 }
296
297 err = mthca_dev_lim(mdev, &dev_lim);
298 if (err) {
299 mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
300 goto err_disable;
301 }
302
303 profile = default_profile;
304 profile.num_uar = dev_lim.uar_size / PAGE_SIZE;
305 profile.uarc_size = 0;
306 if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
307 profile.num_srq = dev_lim.max_srqs;
308
309 err = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
310 if (err < 0)
311 goto err_disable;
312
313 err = mthca_INIT_HCA(mdev, &init_hca, &status);
314 if (err) {
315 mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
316 goto err_disable;
317 }
318 if (status) {
319 mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
320 "aborting.\n", status);
321 err = -EINVAL;
322 goto err_disable;
323 }
324
325 return 0;
326
327 err_disable:
328 mthca_SYS_DIS(mdev, &status);
329
330 return err;
331 }
332
333 static int __devinit mthca_load_fw(struct mthca_dev *mdev)
334 {
335 u8 status;
336 int err;
337
338 /* FIXME: use HCA-attached memory for FW if present */
339
340 mdev->fw.arbel.fw_icm =
341 mthca_alloc_icm(mdev, mdev->fw.arbel.fw_pages,
342 GFP_HIGHUSER | __GFP_NOWARN);
343 if (!mdev->fw.arbel.fw_icm) {
344 mthca_err(mdev, "Couldn't allocate FW area, aborting.\n");
345 return -ENOMEM;
346 }
347
348 err = mthca_MAP_FA(mdev, mdev->fw.arbel.fw_icm, &status);
349 if (err) {
350 mthca_err(mdev, "MAP_FA command failed, aborting.\n");
351 goto err_free;
352 }
353 if (status) {
354 mthca_err(mdev, "MAP_FA returned status 0x%02x, aborting.\n", status);
355 err = -EINVAL;
356 goto err_free;
357 }
358 err = mthca_RUN_FW(mdev, &status);
359 if (err) {
360 mthca_err(mdev, "RUN_FW command failed, aborting.\n");
361 goto err_unmap_fa;
362 }
363 if (status) {
364 mthca_err(mdev, "RUN_FW returned status 0x%02x, aborting.\n", status);
365 err = -EINVAL;
366 goto err_unmap_fa;
367 }
368
369 return 0;
370
371 err_unmap_fa:
372 mthca_UNMAP_FA(mdev, &status);
373
374 err_free:
375 mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
376 return err;
377 }
378
379 static int __devinit mthca_init_icm(struct mthca_dev *mdev,
380 struct mthca_dev_lim *dev_lim,
381 struct mthca_init_hca_param *init_hca,
382 u64 icm_size)
383 {
384 u64 aux_pages;
385 u8 status;
386 int err;
387
388 err = mthca_SET_ICM_SIZE(mdev, icm_size, &aux_pages, &status);
389 if (err) {
390 mthca_err(mdev, "SET_ICM_SIZE command failed, aborting.\n");
391 return err;
392 }
393 if (status) {
394 mthca_err(mdev, "SET_ICM_SIZE returned status 0x%02x, "
395 "aborting.\n", status);
396 return -EINVAL;
397 }
398
399 mthca_dbg(mdev, "%lld KB of HCA context requires %lld KB aux memory.\n",
400 (unsigned long long) icm_size >> 10,
401 (unsigned long long) aux_pages << 2);
402
403 mdev->fw.arbel.aux_icm = mthca_alloc_icm(mdev, aux_pages,
404 GFP_HIGHUSER | __GFP_NOWARN);
405 if (!mdev->fw.arbel.aux_icm) {
406 mthca_err(mdev, "Couldn't allocate aux memory, aborting.\n");
407 return -ENOMEM;
408 }
409
410 err = mthca_MAP_ICM_AUX(mdev, mdev->fw.arbel.aux_icm, &status);
411 if (err) {
412 mthca_err(mdev, "MAP_ICM_AUX command failed, aborting.\n");
413 goto err_free_aux;
414 }
415 if (status) {
416 mthca_err(mdev, "MAP_ICM_AUX returned status 0x%02x, aborting.\n", status);
417 err = -EINVAL;
418 goto err_free_aux;
419 }
420
421 err = mthca_map_eq_icm(mdev, init_hca->eqc_base);
422 if (err) {
423 mthca_err(mdev, "Failed to map EQ context memory, aborting.\n");
424 goto err_unmap_aux;
425 }
426
427 mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base,
428 MTHCA_MTT_SEG_SIZE,
429 mdev->limits.num_mtt_segs,
430 mdev->limits.reserved_mtts, 1);
431 if (!mdev->mr_table.mtt_table) {
432 mthca_err(mdev, "Failed to map MTT context memory, aborting.\n");
433 err = -ENOMEM;
434 goto err_unmap_eq;
435 }
436
437 mdev->mr_table.mpt_table = mthca_alloc_icm_table(mdev, init_hca->mpt_base,
438 dev_lim->mpt_entry_sz,
439 mdev->limits.num_mpts,
440 mdev->limits.reserved_mrws, 1);
441 if (!mdev->mr_table.mpt_table) {
442 mthca_err(mdev, "Failed to map MPT context memory, aborting.\n");
443 err = -ENOMEM;
444 goto err_unmap_mtt;
445 }
446
447 mdev->qp_table.qp_table = mthca_alloc_icm_table(mdev, init_hca->qpc_base,
448 dev_lim->qpc_entry_sz,
449 mdev->limits.num_qps,
450 mdev->limits.reserved_qps, 0);
451 if (!mdev->qp_table.qp_table) {
452 mthca_err(mdev, "Failed to map QP context memory, aborting.\n");
453 err = -ENOMEM;
454 goto err_unmap_mpt;
455 }
456
457 mdev->qp_table.eqp_table = mthca_alloc_icm_table(mdev, init_hca->eqpc_base,
458 dev_lim->eqpc_entry_sz,
459 mdev->limits.num_qps,
460 mdev->limits.reserved_qps, 0);
461 if (!mdev->qp_table.eqp_table) {
462 mthca_err(mdev, "Failed to map EQP context memory, aborting.\n");
463 err = -ENOMEM;
464 goto err_unmap_qp;
465 }
466
467 mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base,
468 MTHCA_RDB_ENTRY_SIZE,
469 mdev->limits.num_qps <<
470 mdev->qp_table.rdb_shift,
471 0, 0);
472 if (!mdev->qp_table.rdb_table) {
473 mthca_err(mdev, "Failed to map RDB context memory, aborting\n");
474 err = -ENOMEM;
475 goto err_unmap_eqp;
476 }
477
478 mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
479 dev_lim->cqc_entry_sz,
480 mdev->limits.num_cqs,
481 mdev->limits.reserved_cqs, 0);
482 if (!mdev->cq_table.table) {
483 mthca_err(mdev, "Failed to map CQ context memory, aborting.\n");
484 err = -ENOMEM;
485 goto err_unmap_rdb;
486 }
487
488 if (mdev->mthca_flags & MTHCA_FLAG_SRQ) {
489 mdev->srq_table.table =
490 mthca_alloc_icm_table(mdev, init_hca->srqc_base,
491 dev_lim->srq_entry_sz,
492 mdev->limits.num_srqs,
493 mdev->limits.reserved_srqs, 0);
494 if (!mdev->srq_table.table) {
495 mthca_err(mdev, "Failed to map SRQ context memory, "
496 "aborting.\n");
497 err = -ENOMEM;
498 goto err_unmap_cq;
499 }
500 }
501
502 /*
503 * It's not strictly required, but for simplicity just map the
504 * whole multicast group table now. The table isn't very big
505 * and it's a lot easier than trying to track ref counts.
506 */
507 mdev->mcg_table.table = mthca_alloc_icm_table(mdev, init_hca->mc_base,
508 MTHCA_MGM_ENTRY_SIZE,
509 mdev->limits.num_mgms +
510 mdev->limits.num_amgms,
511 mdev->limits.num_mgms +
512 mdev->limits.num_amgms,
513 0);
514 if (!mdev->mcg_table.table) {
515 mthca_err(mdev, "Failed to map MCG context memory, aborting.\n");
516 err = -ENOMEM;
517 goto err_unmap_srq;
518 }
519
520 return 0;
521
522 err_unmap_srq:
523 if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
524 mthca_free_icm_table(mdev, mdev->srq_table.table);
525
526 err_unmap_cq:
527 mthca_free_icm_table(mdev, mdev->cq_table.table);
528
529 err_unmap_rdb:
530 mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
531
532 err_unmap_eqp:
533 mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
534
535 err_unmap_qp:
536 mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
537
538 err_unmap_mpt:
539 mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
540
541 err_unmap_mtt:
542 mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
543
544 err_unmap_eq:
545 mthca_unmap_eq_icm(mdev);
546
547 err_unmap_aux:
548 mthca_UNMAP_ICM_AUX(mdev, &status);
549
550 err_free_aux:
551 mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
552
553 return err;
554 }
555
556 static void mthca_free_icms(struct mthca_dev *mdev)
557 {
558 u8 status;
559
560 mthca_free_icm_table(mdev, mdev->mcg_table.table);
561 if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
562 mthca_free_icm_table(mdev, mdev->srq_table.table);
563 mthca_free_icm_table(mdev, mdev->cq_table.table);
564 mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
565 mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
566 mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
567 mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
568 mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
569 mthca_unmap_eq_icm(mdev);
570
571 mthca_UNMAP_ICM_AUX(mdev, &status);
572 mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
573 }
574
575 static int __devinit mthca_init_arbel(struct mthca_dev *mdev)
576 {
577 struct mthca_dev_lim dev_lim;
578 struct mthca_profile profile;
579 struct mthca_init_hca_param init_hca;
580 u64 icm_size;
581 u8 status;
582 int err;
583
584 err = mthca_QUERY_FW(mdev, &status);
585 if (err) {
586 mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
587 return err;
588 }
589 if (status) {
590 mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
591 "aborting.\n", status);
592 return -EINVAL;
593 }
594
595 err = mthca_ENABLE_LAM(mdev, &status);
596 if (err) {
597 mthca_err(mdev, "ENABLE_LAM command failed, aborting.\n");
598 return err;
599 }
600 if (status == MTHCA_CMD_STAT_LAM_NOT_PRE) {
601 mthca_dbg(mdev, "No HCA-attached memory (running in MemFree mode)\n");
602 mdev->mthca_flags |= MTHCA_FLAG_NO_LAM;
603 } else if (status) {
604 mthca_err(mdev, "ENABLE_LAM returned status 0x%02x, "
605 "aborting.\n", status);
606 return -EINVAL;
607 }
608
609 err = mthca_load_fw(mdev);
610 if (err) {
611 mthca_err(mdev, "Failed to start FW, aborting.\n");
612 goto err_disable;
613 }
614
615 err = mthca_dev_lim(mdev, &dev_lim);
616 if (err) {
617 mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
618 goto err_stop_fw;
619 }
620
621 profile = default_profile;
622 profile.num_uar = dev_lim.uar_size / PAGE_SIZE;
623 profile.num_udav = 0;
624 if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
625 profile.num_srq = dev_lim.max_srqs;
626
627 icm_size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
628 if ((int) icm_size < 0) {
629 err = icm_size;
630 goto err_stop_fw;
631 }
632
633 err = mthca_init_icm(mdev, &dev_lim, &init_hca, icm_size);
634 if (err)
635 goto err_stop_fw;
636
637 err = mthca_INIT_HCA(mdev, &init_hca, &status);
638 if (err) {
639 mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
640 goto err_free_icm;
641 }
642 if (status) {
643 mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
644 "aborting.\n", status);
645 err = -EINVAL;
646 goto err_free_icm;
647 }
648
649 return 0;
650
651 err_free_icm:
652 mthca_free_icms(mdev);
653
654 err_stop_fw:
655 mthca_UNMAP_FA(mdev, &status);
656 mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
657
658 err_disable:
659 if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
660 mthca_DISABLE_LAM(mdev, &status);
661
662 return err;
663 }
664
665 static void mthca_close_hca(struct mthca_dev *mdev)
666 {
667 u8 status;
668
669 mthca_CLOSE_HCA(mdev, 0, &status);
670
671 if (mthca_is_memfree(mdev)) {
672 mthca_free_icms(mdev);
673
674 mthca_UNMAP_FA(mdev, &status);
675 mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
676
677 if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
678 mthca_DISABLE_LAM(mdev, &status);
679 } else
680 mthca_SYS_DIS(mdev, &status);
681 }
682
683 static int __devinit mthca_init_hca(struct mthca_dev *mdev)
684 {
685 u8 status;
686 int err;
687 struct mthca_adapter adapter;
688
689 if (mthca_is_memfree(mdev))
690 err = mthca_init_arbel(mdev);
691 else
692 err = mthca_init_tavor(mdev);
693
694 if (err)
695 return err;
696
697 err = mthca_QUERY_ADAPTER(mdev, &adapter, &status);
698 if (err) {
699 mthca_err(mdev, "QUERY_ADAPTER command failed, aborting.\n");
700 goto err_close;
701 }
702 if (status) {
703 mthca_err(mdev, "QUERY_ADAPTER returned status 0x%02x, "
704 "aborting.\n", status);
705 err = -EINVAL;
706 goto err_close;
707 }
708
709 mdev->eq_table.inta_pin = adapter.inta_pin;
710 mdev->rev_id = adapter.revision_id;
711 memcpy(mdev->board_id, adapter.board_id, sizeof mdev->board_id);
712
713 return 0;
714
715 err_close:
716 mthca_close_hca(mdev);
717 return err;
718 }
719
720 static int __devinit mthca_setup_hca(struct mthca_dev *dev)
721 {
722 int err;
723 u8 status;
724
725 MTHCA_INIT_DOORBELL_LOCK(&dev->doorbell_lock);
726
727 err = mthca_init_uar_table(dev);
728 if (err) {
729 mthca_err(dev, "Failed to initialize "
730 "user access region table, aborting.\n");
731 return err;
732 }
733
734 err = mthca_uar_alloc(dev, &dev->driver_uar);
735 if (err) {
736 mthca_err(dev, "Failed to allocate driver access region, "
737 "aborting.\n");
738 goto err_uar_table_free;
739 }
740
741 dev->kar = ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
742 if (!dev->kar) {
743 mthca_err(dev, "Couldn't map kernel access region, "
744 "aborting.\n");
745 err = -ENOMEM;
746 goto err_uar_free;
747 }
748
749 err = mthca_init_pd_table(dev);
750 if (err) {
751 mthca_err(dev, "Failed to initialize "
752 "protection domain table, aborting.\n");
753 goto err_kar_unmap;
754 }
755
756 err = mthca_init_mr_table(dev);
757 if (err) {
758 mthca_err(dev, "Failed to initialize "
759 "memory region table, aborting.\n");
760 goto err_pd_table_free;
761 }
762
763 err = mthca_pd_alloc(dev, 1, &dev->driver_pd);
764 if (err) {
765 mthca_err(dev, "Failed to create driver PD, "
766 "aborting.\n");
767 goto err_mr_table_free;
768 }
769
770 err = mthca_init_eq_table(dev);
771 if (err) {
772 mthca_err(dev, "Failed to initialize "
773 "event queue table, aborting.\n");
774 goto err_pd_free;
775 }
776
777 err = mthca_cmd_use_events(dev);
778 if (err) {
779 mthca_err(dev, "Failed to switch to event-driven "
780 "firmware commands, aborting.\n");
781 goto err_eq_table_free;
782 }
783
784 err = mthca_NOP(dev, &status);
785 if (err || status) {
786 mthca_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting.\n",
787 dev->mthca_flags & MTHCA_FLAG_MSI_X ?
788 dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector :
789 dev->pdev->irq);
790 if (dev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X))
791 mthca_err(dev, "Try again with MSI/MSI-X disabled.\n");
792 else
793 mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n");
794
795 goto err_cmd_poll;
796 }
797
798 mthca_dbg(dev, "NOP command IRQ test passed\n");
799
800 err = mthca_init_cq_table(dev);
801 if (err) {
802 mthca_err(dev, "Failed to initialize "
803 "completion queue table, aborting.\n");
804 goto err_cmd_poll;
805 }
806
807 err = mthca_init_srq_table(dev);
808 if (err) {
809 mthca_err(dev, "Failed to initialize "
810 "shared receive queue table, aborting.\n");
811 goto err_cq_table_free;
812 }
813
814 err = mthca_init_qp_table(dev);
815 if (err) {
816 mthca_err(dev, "Failed to initialize "
817 "queue pair table, aborting.\n");
818 goto err_srq_table_free;
819 }
820
821 err = mthca_init_av_table(dev);
822 if (err) {
823 mthca_err(dev, "Failed to initialize "
824 "address vector table, aborting.\n");
825 goto err_qp_table_free;
826 }
827
828 err = mthca_init_mcg_table(dev);
829 if (err) {
830 mthca_err(dev, "Failed to initialize "
831 "multicast group table, aborting.\n");
832 goto err_av_table_free;
833 }
834
835 return 0;
836
837 err_av_table_free:
838 mthca_cleanup_av_table(dev);
839
840 err_qp_table_free:
841 mthca_cleanup_qp_table(dev);
842
843 err_srq_table_free:
844 mthca_cleanup_srq_table(dev);
845
846 err_cq_table_free:
847 mthca_cleanup_cq_table(dev);
848
849 err_cmd_poll:
850 mthca_cmd_use_polling(dev);
851
852 err_eq_table_free:
853 mthca_cleanup_eq_table(dev);
854
855 err_pd_free:
856 mthca_pd_free(dev, &dev->driver_pd);
857
858 err_mr_table_free:
859 mthca_cleanup_mr_table(dev);
860
861 err_pd_table_free:
862 mthca_cleanup_pd_table(dev);
863
864 err_kar_unmap:
865 iounmap(dev->kar);
866
867 err_uar_free:
868 mthca_uar_free(dev, &dev->driver_uar);
869
870 err_uar_table_free:
871 mthca_cleanup_uar_table(dev);
872 return err;
873 }
874
875 static int __devinit mthca_request_regions(struct pci_dev *pdev,
876 int ddr_hidden)
877 {
878 int err;
879
880 /*
881 * We can't just use pci_request_regions() because the MSI-X
882 * table is right in the middle of the first BAR. If we did
883 * pci_request_region and grab all of the first BAR, then
884 * setting up MSI-X would fail, since the PCI core wants to do
885 * request_mem_region on the MSI-X vector table.
886 *
887 * So just request what we need right now, and request any
888 * other regions we need when setting up EQs.
889 */
890 if (!request_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
891 MTHCA_HCR_SIZE, DRV_NAME))
892 return -EBUSY;
893
894 err = pci_request_region(pdev, 2, DRV_NAME);
895 if (err)
896 goto err_bar2_failed;
897
898 if (!ddr_hidden) {
899 err = pci_request_region(pdev, 4, DRV_NAME);
900 if (err)
901 goto err_bar4_failed;
902 }
903
904 return 0;
905
906 err_bar4_failed:
907 pci_release_region(pdev, 2);
908
909 err_bar2_failed:
910 release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
911 MTHCA_HCR_SIZE);
912
913 return err;
914 }
915
916 static void mthca_release_regions(struct pci_dev *pdev,
917 int ddr_hidden)
918 {
919 if (!ddr_hidden)
920 pci_release_region(pdev, 4);
921
922 pci_release_region(pdev, 2);
923
924 release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
925 MTHCA_HCR_SIZE);
926 }
927
928 static int __devinit mthca_enable_msi_x(struct mthca_dev *mdev)
929 {
930 struct msix_entry entries[3];
931 int err;
932
933 entries[0].entry = 0;
934 entries[1].entry = 1;
935 entries[2].entry = 2;
936
937 err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries));
938 if (err) {
939 if (err > 0)
940 mthca_info(mdev, "Only %d MSI-X vectors available, "
941 "not using MSI-X\n", err);
942 return err;
943 }
944
945 mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector;
946 mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;
947 mdev->eq_table.eq[MTHCA_EQ_CMD ].msi_x_vector = entries[2].vector;
948
949 return 0;
950 }
951
952 /* Types of supported HCA */
953 enum {
954 TAVOR, /* MT23108 */
955 ARBEL_COMPAT, /* MT25208 in Tavor compat mode */
956 ARBEL_NATIVE, /* MT25208 with extended features */
957 SINAI /* MT25204 */
958 };
959
960 #define MTHCA_FW_VER(major, minor, subminor) \
961 (((u64) (major) << 32) | ((u64) (minor) << 16) | (u64) (subminor))
962
963 static struct {
964 u64 latest_fw;
965 u32 flags;
966 } mthca_hca_table[] = {
967 [TAVOR] = { .latest_fw = MTHCA_FW_VER(3, 4, 0),
968 .flags = 0 },
969 [ARBEL_COMPAT] = { .latest_fw = MTHCA_FW_VER(4, 7, 400),
970 .flags = MTHCA_FLAG_PCIE },
971 [ARBEL_NATIVE] = { .latest_fw = MTHCA_FW_VER(5, 1, 0),
972 .flags = MTHCA_FLAG_MEMFREE |
973 MTHCA_FLAG_PCIE },
974 [SINAI] = { .latest_fw = MTHCA_FW_VER(1, 0, 800),
975 .flags = MTHCA_FLAG_MEMFREE |
976 MTHCA_FLAG_PCIE |
977 MTHCA_FLAG_SINAI_OPT }
978 };
979
980 static int __devinit mthca_init_one(struct pci_dev *pdev,
981 const struct pci_device_id *id)
982 {
983 static int mthca_version_printed = 0;
984 int ddr_hidden = 0;
985 int err;
986 struct mthca_dev *mdev;
987
988 if (!mthca_version_printed) {
989 printk(KERN_INFO "%s", mthca_version);
990 ++mthca_version_printed;
991 }
992
993 printk(KERN_INFO PFX "Initializing %s\n",
994 pci_name(pdev));
995
996 if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) {
997 printk(KERN_ERR PFX "%s has invalid driver data %lx\n",
998 pci_name(pdev), id->driver_data);
999 return -ENODEV;
1000 }
1001
1002 err = pci_enable_device(pdev);
1003 if (err) {
1004 dev_err(&pdev->dev, "Cannot enable PCI device, "
1005 "aborting.\n");
1006 return err;
1007 }
1008
1009 /*
1010 * Check for BARs. We expect 0: 1MB, 2: 8MB, 4: DDR (may not
1011 * be present)
1012 */
1013 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
1014 pci_resource_len(pdev, 0) != 1 << 20) {
1015 dev_err(&pdev->dev, "Missing DCS, aborting.\n");
1016 err = -ENODEV;
1017 goto err_disable_pdev;
1018 }
1019 if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
1020 dev_err(&pdev->dev, "Missing UAR, aborting.\n");
1021 err = -ENODEV;
1022 goto err_disable_pdev;
1023 }
1024 if (!(pci_resource_flags(pdev, 4) & IORESOURCE_MEM))
1025 ddr_hidden = 1;
1026
1027 err = mthca_request_regions(pdev, ddr_hidden);
1028 if (err) {
1029 dev_err(&pdev->dev, "Cannot obtain PCI resources, "
1030 "aborting.\n");
1031 goto err_disable_pdev;
1032 }
1033
1034 pci_set_master(pdev);
1035
1036 err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
1037 if (err) {
1038 dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
1039 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1040 if (err) {
1041 dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
1042 goto err_free_res;
1043 }
1044 }
1045 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1046 if (err) {
1047 dev_warn(&pdev->dev, "Warning: couldn't set 64-bit "
1048 "consistent PCI DMA mask.\n");
1049 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1050 if (err) {
1051 dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
1052 "aborting.\n");
1053 goto err_free_res;
1054 }
1055 }
1056
1057 mdev = (struct mthca_dev *) ib_alloc_device(sizeof *mdev);
1058 if (!mdev) {
1059 dev_err(&pdev->dev, "Device struct alloc failed, "
1060 "aborting.\n");
1061 err = -ENOMEM;
1062 goto err_free_res;
1063 }
1064
1065 mdev->pdev = pdev;
1066
1067 mdev->mthca_flags = mthca_hca_table[id->driver_data].flags;
1068 if (ddr_hidden)
1069 mdev->mthca_flags |= MTHCA_FLAG_DDR_HIDDEN;
1070
1071 /*
1072 * Now reset the HCA before we touch the PCI capabilities or
1073 * attempt a firmware command, since a boot ROM may have left
1074 * the HCA in an undefined state.
1075 */
1076 err = mthca_reset(mdev);
1077 if (err) {
1078 mthca_err(mdev, "Failed to reset HCA, aborting.\n");
1079 goto err_free_dev;
1080 }
1081
1082 if (msi_x && !mthca_enable_msi_x(mdev))
1083 mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
1084 if (msi && !(mdev->mthca_flags & MTHCA_FLAG_MSI_X) &&
1085 !pci_enable_msi(pdev))
1086 mdev->mthca_flags |= MTHCA_FLAG_MSI;
1087
1088 if (mthca_cmd_init(mdev)) {
1089 mthca_err(mdev, "Failed to init command interface, aborting.\n");
1090 goto err_free_dev;
1091 }
1092
1093 err = mthca_tune_pci(mdev);
1094 if (err)
1095 goto err_cmd;
1096
1097 err = mthca_init_hca(mdev);
1098 if (err)
1099 goto err_cmd;
1100
1101 if (mdev->fw_ver < mthca_hca_table[id->driver_data].latest_fw) {
1102 mthca_warn(mdev, "HCA FW version %d.%d.%d is old (%d.%d.%d is current).\n",
1103 (int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff,
1104 (int) (mdev->fw_ver & 0xffff),
1105 (int) (mthca_hca_table[id->driver_data].latest_fw >> 32),
1106 (int) (mthca_hca_table[id->driver_data].latest_fw >> 16) & 0xffff,
1107 (int) (mthca_hca_table[id->driver_data].latest_fw & 0xffff));
1108 mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n");
1109 }
1110
1111 err = mthca_setup_hca(mdev);
1112 if (err)
1113 goto err_close;
1114
1115 err = mthca_register_device(mdev);
1116 if (err)
1117 goto err_cleanup;
1118
1119 err = mthca_create_agents(mdev);
1120 if (err)
1121 goto err_unregister;
1122
1123 pci_set_drvdata(pdev, mdev);
1124
1125 return 0;
1126
1127 err_unregister:
1128 mthca_unregister_device(mdev);
1129
1130 err_cleanup:
1131 mthca_cleanup_mcg_table(mdev);
1132 mthca_cleanup_av_table(mdev);
1133 mthca_cleanup_qp_table(mdev);
1134 mthca_cleanup_srq_table(mdev);
1135 mthca_cleanup_cq_table(mdev);
1136 mthca_cmd_use_polling(mdev);
1137 mthca_cleanup_eq_table(mdev);
1138
1139 mthca_pd_free(mdev, &mdev->driver_pd);
1140
1141 mthca_cleanup_mr_table(mdev);
1142 mthca_cleanup_pd_table(mdev);
1143 mthca_cleanup_uar_table(mdev);
1144
1145 err_close:
1146 mthca_close_hca(mdev);
1147
1148 err_cmd:
1149 mthca_cmd_cleanup(mdev);
1150
1151 err_free_dev:
1152 if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
1153 pci_disable_msix(pdev);
1154 if (mdev->mthca_flags & MTHCA_FLAG_MSI)
1155 pci_disable_msi(pdev);
1156
1157 ib_dealloc_device(&mdev->ib_dev);
1158
1159 err_free_res:
1160 mthca_release_regions(pdev, ddr_hidden);
1161
1162 err_disable_pdev:
1163 pci_disable_device(pdev);
1164 pci_set_drvdata(pdev, NULL);
1165 return err;
1166 }
1167
1168 static void __devexit mthca_remove_one(struct pci_dev *pdev)
1169 {
1170 struct mthca_dev *mdev = pci_get_drvdata(pdev);
1171 u8 status;
1172 int p;
1173
1174 if (mdev) {
1175 mthca_free_agents(mdev);
1176 mthca_unregister_device(mdev);
1177
1178 for (p = 1; p <= mdev->limits.num_ports; ++p)
1179 mthca_CLOSE_IB(mdev, p, &status);
1180
1181 mthca_cleanup_mcg_table(mdev);
1182 mthca_cleanup_av_table(mdev);
1183 mthca_cleanup_qp_table(mdev);
1184 mthca_cleanup_srq_table(mdev);
1185 mthca_cleanup_cq_table(mdev);
1186 mthca_cmd_use_polling(mdev);
1187 mthca_cleanup_eq_table(mdev);
1188
1189 mthca_pd_free(mdev, &mdev->driver_pd);
1190
1191 mthca_cleanup_mr_table(mdev);
1192 mthca_cleanup_pd_table(mdev);
1193
1194 iounmap(mdev->kar);
1195 mthca_uar_free(mdev, &mdev->driver_uar);
1196 mthca_cleanup_uar_table(mdev);
1197 mthca_close_hca(mdev);
1198 mthca_cmd_cleanup(mdev);
1199
1200 if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
1201 pci_disable_msix(pdev);
1202 if (mdev->mthca_flags & MTHCA_FLAG_MSI)
1203 pci_disable_msi(pdev);
1204
1205 ib_dealloc_device(&mdev->ib_dev);
1206 mthca_release_regions(pdev, mdev->mthca_flags &
1207 MTHCA_FLAG_DDR_HIDDEN);
1208 pci_disable_device(pdev);
1209 pci_set_drvdata(pdev, NULL);
1210 }
1211 }
1212
1213 static struct pci_device_id mthca_pci_table[] = {
1214 { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR),
1215 .driver_data = TAVOR },
1216 { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_TAVOR),
1217 .driver_data = TAVOR },
1218 { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
1219 .driver_data = ARBEL_COMPAT },
1220 { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
1221 .driver_data = ARBEL_COMPAT },
1222 { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL),
1223 .driver_data = ARBEL_NATIVE },
1224 { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL),
1225 .driver_data = ARBEL_NATIVE },
1226 { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI),
1227 .driver_data = SINAI },
1228 { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI),
1229 .driver_data = SINAI },
1230 { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
1231 .driver_data = SINAI },
1232 { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
1233 .driver_data = SINAI },
1234 { 0, }
1235 };
1236
1237 MODULE_DEVICE_TABLE(pci, mthca_pci_table);
1238
1239 static struct pci_driver mthca_driver = {
1240 .name = DRV_NAME,
1241 .id_table = mthca_pci_table,
1242 .probe = mthca_init_one,
1243 .remove = __devexit_p(mthca_remove_one)
1244 };
1245
1246 static int __init mthca_init(void)
1247 {
1248 int ret;
1249
1250 ret = pci_register_driver(&mthca_driver);
1251 return ret < 0 ? ret : 0;
1252 }
1253
1254 static void __exit mthca_cleanup(void)
1255 {
1256 pci_unregister_driver(&mthca_driver);
1257 }
1258
1259 module_init(mthca_init);
1260 module_exit(mthca_cleanup);
Linux kernel - Deliverables
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